Route: Il Cotto spring - Semelano � Rosola. Duration: 2 hours 30 mins (outward leg) � 2 hours 40 mins (return). Height difference (outward leg): 230 mts (ascent) - 330 mts (descent). Length of route: 8.5 kms. Difficulty: T/E tourist/hikers. Points of interest: natural site of Il Cotto spring; picturesque hamlet of Semelano; Lavacchio cave; hamlet. with medieval tower at Rosola.